A Mutual Favor by Ann Jacobs

Two good friends, two thorny problems. Kurt needs a wife to convince a judge he can provide a stable home for his son. Shelly wants a baby to love. She's had a crush on him for years. He's never thought of her as anything more than his best buddy. So when she offers him a solution to both their problems, he's not sure. But knowing she wants him changes everything, and pretty soon he can't keep his mind or his hands off her...